42 CFR 418.200: Requirements for coverage.

To be covered, hospice services must meet the following requirements. They must be reasonable and necessary for the palliation and management of the terminal illness as well as related conditions. The individual must elect hospice care in accordance with § 418.24. A plan of care must be established and periodically reviewed by the attending physician, the medical director, and the interdisciplinary group of the hospice program as set forth in § 418.56. That plan of care must be established before hospice care is provided. The services provided must be consistent with the plan of care. A certification that the individual is terminally ill must be completed as set forth in section § 418.22.